Thalleulia gracilescens is a species of moth of the Tortricidae family. It is found in Pichincha Province, Ecuador. The wingspan is about 17.5 mm. The ground colour of the forewings is cinnamon brown, but paler and mixed with pearl grey in the distal third. There is brown transverse strigulation (fine streaks) and there are brown lines. The hindwings are pale brown, but paler basally.